Question

In an experiment to check the amount of carbon dioxide, atmospheric air and exhaled air is passed through lime water. If the rate of changing lime water milky in the tube containing exhaled air is 10. What is the approximate rate of changing lime water milky in the tube containing atmospheric air?

• A. 30
• B. 40
• C. 5
• D. Lime water doesn't turn milky in this tube

Answer 1

The correct option is C 5

The air of atmosphere contains 0.04% of carbon dioxide.

The air we exhale contains 4% of carbon dioxide.

So the air we exhaled has 100 times more concentrated.

The rate becomes 10/100 =0.5 or 1/2.

So the rate becomes half.

So the correct option is '5'.